ATLANTA, Georgia -- Passengers were being urged Monday morning to check with airlines for flight information as operations resumed in Atlanta following a power outage at the world's busiest airport.
A tweet early Monday from Hartsfield-Jackson Atlanta International Airport said airport concessionaires and the security lines are open.
Georgia Power said a fire in an underground electrical facility caused a sudden power outage around 1 p.m. Sunday. That brought the airport to a standstill and grounded more than a thousand flights, leaving thousands of people stranded.
Power was restored around midnight.
Atlanta-based Delta Air Lines is the hardest hit airline. In a tweet, the airline urged travelers to use its mobile app or website for booking assistance and updated flight status. Delta was also allowing people traveling to, from or through Atlanta through Tuesday to make a one-time change for no fee.
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Atlanta airport resumes operations after power outage